Lecture 6 - BIOL104-04 September 3, 2010 Lecture #6 Ch 3...

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BIOL104-04 September 3, 2010 Lecture #6 Ch 5.1 & 5.2 Membranes
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Proteins are flexible
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Protein Structure Primary Structure – Amino acid sequence Secondary Structure – Due to hydrogen bonding between atoms in the backbone Tertiary Structure – Overall shape – Due to interactions of amino acid side chains Quaternary Structure – 2 or more polypeptides interact to form a single structure
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3° Structure
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Protein Denaturation
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Larger proteins need help to be folded properly
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Biological Macromolecules ! Carbohydrates ! Nucleic Acids ! Proteins Lipids
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Plasma membrane • Layer of molecules that separates the inside of the cell from the external environment • The most abundant molecules in membranes are LIPIDS
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Lipids Carbon-containing compounds – Nonpolar – Hydrophobic – Do not dissolve readily in water – Hydrocarbons
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Hydrocarbons • Molecules that contain only carbon • Nonpolar – Electrons are shared equally • Building blocks of lipids – Isoprene – Fatty acids
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This note was uploaded on 05/03/2011 for the course BIOL 104 taught by Professor Bray-speth during the Fall '11 term at Saint Louis.

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Lecture 6 - BIOL104-04 September 3, 2010 Lecture #6 Ch 3...

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